胃泌素瘤所致溃疡的特点是()
A．典型部位溃疡
B．多发性溃疡
C．难治性溃疡
D．高胃酸分泌
E．高空腹血清胃泌素
参考答案：B, C, D, E
The earthquake ______ when I _______some cleaning.
A．starts, was doing
B．started, was doing
C．was starting, was doing
D．starts, were doing
英译中：International freight forwarding agent
